Conservative Dentistry Department, Faculty of Dentistry, Delta University for Science and Technology, Mansoura, Egypt.
Conservative Dentistry Department, Faculty of Dentistry, Cairo University, Cairo, Egypt.
Sci Rep. 2024 Oct 14;14(1):23966. doi: 10.1038/s41598-024-73200-6.
This study aimed to clinically evaluate the performance of non-preheated bulk fill resin composite in class II cavities versus one, five and ten-time preheating cycles at 68 °C. Eighty-four recruited participants were randomly allocated into four groups (21 patients per group). One posterior Bulk-fill proximal restoration was performed for each participant according to the preheating cycles where in group I; teeth were restored with non-heated resin composite, group II: One preheating cycle of composite syringe was performed prior restoration, and group III: five preheating cycles while for group IV: Ten preheating cycles were performed. These restorations were clinically evaluated at 6, 12, 18 and 24 months. Statistical analysis was performed using one way ANOVA, with set p-value < 0.05. The results revealed that there was perfect agreement between both observers and observations WK (95% CI) [0.908 (0.780:1.000)] and [0.940 (0.824:1.000)], respectively. All restorations showed acceptable clinical performance with alpha and bravo scores. No replacement was required for any restoration. No statistically significant differences were detected between the control and intervention groups across all parameters during the various evaluation stages. It could be concluded that the clinical performance of ten cycles of repeated preheated bulk fill resin composite was equivalent to that of non-preheating resin composites after 24 months follow-up period, with great improvement in manipulation. Preheating of resin composite could be performed up to ten cycles prior to placement without any clinical adverse consequences on the performance of the restoration.
本研究旨在临床评估非预热块状填充树脂复合材料在 II 类窝洞中的性能，与 68°C 下一次、五次和十次预热循环的性能。招募了 84 名参与者，随机分为四组（每组 21 名患者）。根据预热循环，每位参与者均进行了一项后牙大块填充近中修复体，其中组 I 中未对牙齿进行加热；组 II 中，在修复前对复合注射器进行一次预热循环，组 III 中进行五次预热循环，而组 IV 中进行十次预热循环。这些修复体在 6、12、18 和 24 个月时进行临床评估。采用单因素方差分析进行统计学分析，设 p 值<0.05。结果显示，两位观察者和观察期 WK（95%CI）之间存在完美一致性[0.908（0.780:1.000）]和[0.940（0.824:1.000）]。所有修复体的临床性能均为 alpha 和 bravo 评分。没有任何修复体需要更换。在各个评估阶段，所有参数在对照组和干预组之间均未发现统计学差异。结论是，在 24 个月的随访期内，重复预热十次的块状填充树脂复合材料的临床性能与未预热树脂复合材料相当，操作性能有很大提高。在放置前，树脂复合材料可以进行多达十次的预热，而不会对修复体的性能产生任何临床不良后果。
